matplotlib Code

make close method a no-op for remote datasets.

fixed a bug in unit processing -- thanks chris

add docstring.

adjust map projection region

bump version number

update fcstmaps

only install dap and httplib2 if not already available

add httplib2, since dap requires it.

add missing file to dap package

add the ability to read remote datasets over http using the opendap
client by Roberto D'Almeida (included). NetCDFFile modified so
that it uses the opendap client if the filename begins with 'http'.